I had a 240 that would bog out completely every now and then...Chjanged the O2 sensor and voila! 2 weeks later it came back again, tried another O2 and it would go in and out. Ended up getting a new catalytic converter, spark plugs, wires, cap/rotor, cleaned out the fuel injection system, fuel filter, checked timing, etc. Never did find out what it was or what this has to do with your car...but Good luck